Add tosi3k to k8s-infra-prow-viewers@kubernetes.io group
Add tosi3k to k8s-infra-prow-viewers@kubernetes.io group

Follow-up on https://github.com/kubernetes/test-infra/pull/18471#discussion_r461049446. This is to have more insight if some resource limits decrease for scalability test jobs could be possible.

/cc spiffxp
thockin/k8s.io,thockin/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io,thockin/k8s.io,thockin/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io